121997112 has 16 divisors (see below), whose sum is σ = 304992840. Its totient is φ = 40665696.

The previous prime is 121997111. The next prime is 121997131. The reversal of 121997112 is 211799121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121997111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541583 + ... + 2541630.

Almost surely, 2^121997112 is an apocalyptic number.

121997112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121997112 is an abundant number, since it is smaller than the sum of its proper divisors (182995728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121997112 is a wasteful number, since it uses less digits than its factorization.

121997112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083222 (or 5083218 counting only the distinct ones).

The product of its digits is 2268, while the sum is 33.

The square root of 121997112 is about 11045.2302827963. The cubic root of 121997112 is about 495.9636528169.

The spelling of 121997112 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, one hundred twelve".